FlyoutHeader hangs ios application on startup

[BaldeGH]

Description

Adding a Layout inside of the Shell.FlyoutHeader is causing the application to hang/crash on ios simulator and device

Repo

Steps to Reproduce

1. Create a new maui program
2. Add LayoutControl to AppShell.xaml's Shell.FlyoutHeader
3. Build & Deploy

Version with bug

6.0.400 (current)

Last version that worked well

6.0.312

Affected platforms

iOS

Affected platform versions

iOS 15.4

Did you find any workaround?

Remove the VerticalStackLayout and only allow a single item in the flyout

Relevant log output

No response

[lnaie]

I have this header in the AppShell.xaml, just before a <Shell.FlyoutFooterTemplate>:

    <Shell.FlyoutHeaderTemplate>
        <DataTemplate>
            <Grid HeightRequest="150">
                <Image 
                    Aspect="AspectFill" 
                    Source="flyout_logo.jpg" 
                    Opacity="0.9" />
            </Grid>
        </DataTemplate>
    </Shell.FlyoutHeaderTemplate>

It used to work just before the latest update for iOS. The app gets stuck on the loading screen with .net logo.

I commented it out and now the app goes past the loading screen, but -- yeah, it has some another issue, that I have yet to identify here in github. It's not getting better yet with these new builds.

[AidarNurmukhametov]

Hello, we are developing DevExpress .NET MAUI controls and experienced the same issue in the our demo application. This issue has a High priority for us and we do not have a workaround. Thank you for your help!

[kristinx0211]

verified repro on IOS with above project.

[svaldetero]

This happens in my app too. I see this error message in the Debug output when it happens:
[TableView] Warning once only: UITableView was told to layout its visible cells and other contents without being in the view hierarchy (the table view or one of its superviews has not been added to a window). This may cause bugs by forcing views inside the table view to load and perform layout without accurate information (e.g. table view bounds, trait collection, layout margins, safe area insets, etc), and will also cause unnecessary performance overhead due to extra layout passes. Make a symbolic breakpoint at UITableViewAlertForLayoutOutsideViewHierarchy to catch this in the debugger and see what caused this to occur, so you can avoid this action altogether if possible, or defer it until the table view has been added to a window. Table view: <_UIMoreListTableView: 0x7f78beb8f800; frame = (0 0; 0 0); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x600002d2fd50>; layer = <CALayer: 0x6000029a4de0>; contentOffset: {0, 0}; contentSiz e: {0, 0}; adjustedContentInset: {0, 0, 0, 0}; dataSource: <UIMoreListController: 0x7f78fe764aa0>>

[pierre01]

I have the same issue when I set the Icon property in a ShellContent element in IOS

[svaldetero]

@PureWeen marked this as service release 3. Release notes from https://docs.microsoft.com/en-us/visualstudio/releases/2022/release-notes-preview#summary-of-whats-new-in-this-release-of-visual-studio-2022-version-173-preview-4 just says ".NET MAUI Servicing Updates". Which service release was included in that update? Was this item included? Anywhere someone can tie a VS Update number to a MAUI Milestone so we know when our issue is fixed?

[pierre01]

I have not seen this issue with 6.0.419 anymore.

[PureWeen]

@svaldetero it should be resolved with the latest public preview release